Tack-driving machine



(No Model.)

a G FERGUSON TACK DRIVING MAGHINE.

No. 562,518. PatentedJu'neZS, 1896.

A TENF QFFIGE;

scones FERGUSON, or nos'roN, MASSACHUSETTS.

YTACK-DRIVINGV MACHINE. Q

' SPECIFICATION forming" part of Letters Patent No. 562,518, dated June 23, 1896.

Application filed October 5,1894. Serial No. 524,981.. (No model.)

To a'ZZ whom i1: may concern.

Be it known that 1, Gnonen FERGUSON, of Boston, in the county of Suffolk and State of Massachusetts, have invented-a new and useful lm n'ovement in Tack-Driving Machines} of which the following isa specification. My invention relates to tack-driving 111a chines; and it consists tor described and claimed.

In the drawings, Figure 1 is a vertical section through the machine. Fig.2 is a side View from the other side, showing part of the interior by dotted lines.

1 is the body of the machine, whiohis tubular and the upper part of which serves as the walls of a cylinder 30..

2 is the head of the'cylinder through which moves the piston at, provided with the head 5 is a packing of the ordinary construction. 6 is the piston-head, also of the ordinary constrnction, of two plates of metal with a leather packing between them; The piston 4 is continned some distance below the piston-head, sliding in a part of the body 1, of smaller bore than the part serving as acylinder, and bears the plunger 7, which is inserted into its lower end and thcrefiiixed in any suitable manner.

8 is a removable nose-piece, forwhich a longer onc'niay be substituted for special T kinds of worlc where the tack: is tobc driven only partly home and i afterward pulled out. 9 is the valve supplying the cylinder with compressed air, or steam, from the tubular projection 10, connected to any suitable source by the flexible pipe 24.

The head 2 is screwed to the body 1, and is secured from turning by the check-nut 1'1. Owing to the fact that the work must be turned in tacl'ring around a shoe, while the supply-pipe tends to restrain it to one particular position, this check-nut is especially valuable, as without it the head would soon work loose. i l 12 a spiral spri'o'glltted around the pis- (I011 and confined between ihs head and the pachi u g 5, so as to return the piston and-plunger into position for anew stroke as soon as the air in the cylinder s allowed to escape. 13 the tack-raceway, of the usual pattern, heading into the channel iii-which the plunin certain new and ,nseful constructions and combinations "of parts of the same substantially as hereinafthe form of a spring attached at its upper end by screws 15 to the body of the machine.

The sleeve .16 slides upon the body 1 and is held normally up against the check-nut 11 by. means of a spiral spring 17, introduced between its head and an enlargement 18 on the body 1 To the head of this sleeve is pivoted the link 19, which actuates thewalve 9 by being attached to a rocking a-rni 20, fixed to the valve. When the sleeve is Y pushed down to. the position shown in Fig. 1, the valve is opened and air is admitted to the cylinder, forcing the piston 3 and plunger 7 down, and driving the tack fed into the channel from the raceway into whatever the nose 8 of the machine is placed against. Upon releasing the sleeve the spiral spring 17 will return it to the position shown in Fig. 2,which closes the valve and allows the air to escape through the hole 21 in thecenter of the valve, when the stroke;

A part of the body and the raceway 13 are shown as not sectioned in Fig.

consist of tworegistering portions, one of,

7 piston will return by the pressure of the spiral'sprin g 12 into position for a new The-tacks checked tndad- 80 l 1 because they j which is represented as removed, so as to oX- pose the flat face of the other. together by means of screws through the two upper screw-holes 22 22. The nose '8 has two flanges 23 on each side overlapping the body 1 and attached thereto by screws through the lower screw-holes 22 22. 'This is to prevent the nose from twisting and becoming loose, as it would quickly do without the flanges. I

p The operation of the machine is as follows:

They are fixed I The operator takes the instrument in his left hand, holding it by thesleevc 16; and with his right hand manipulates the pinccrs by which he draws the leatherv of the upper filll'll y f,

over the edge of the insole. When he has drawn it just far. enough, he applies the nose 8 of the tacker to-the place where he wishes to drive the tack in and pushes down the sleeve. This admits air to the cylinder through yalve 9 ,as before explained, and drives down the plunger7 with the tack ahead IOO of it. A release of pressure on the sleeve Wlilldl'flWS the nose of the tucker from the face of the leather and re urus the ele'eve lulu p0- sitinn [or :i new thrusl in Hm sunie nmnuer.

The ope utiuu nil lhe iimlruuieul \vilh (Olllpressed air by menus of (he leere possesses niuuyimportantndvuulny-rs. lulhenldfm'm 0i Lneker die worluunu had to hold lhe instriu Ineut in one hand, slreimh vihe leather into pruper plnce with lhe pineers, hold it, there by IH'PNHiHg the nuseuf lhelneker down upon it, 0r 1) some other device, drop the piueers, pie]; up his hummer, and strike the head 3 of the piston, driving home lhe inelc. ii) the use of (unipressed uir instead of n ilfllllmer in nelunle the piston and plunger the neeessil- (-1" shifting 10ml: isdon'e mm with.

llythe use of lhe sleeve .lfi theu'urlnunu is able to g'rnsp lhe instrument |iru1l \',nud n'ilh lheszune nmtiuu by \vhieh he applies the nose In the leather the plunger is uulmnulienlly position relative to the instrument, as would be the case if the thumb 0r linger had to be nlunys in position for pressing such a lever, lml. as the instrumenl is moved around the shoe the hand ,enn be turned without turn- 0 member, :1 soul-re of fluid supply, a eondnit 4o llnrei'rmu to said cylinder, a valve in said euuduil, n sleeve sliding" upon said cylinder and :ninpted in be grasped to guide snid mm ehiue, nud nu nrui nud link euuneeling said. \nlve and sleeve.

(.Wllll H1) FERGUSON.

W it ueuses:

LEVINE lhu RICE, 1..0('Ki. u:'rux. 

